Superlux HD 381, In-ear hi-fi earphones, Dynamic driver with 13.5 mm, Impedance 16 Ohm, Sensitivity 103 dB, Frequency band 20 - 20,000 Hz, Cable length 60 cm with stereo jack 3.5 mm, Additional ear pieces, Incl. Extension cable (60 cm) and cable clip, Colour: Black